找规律题 若1/1X3+1/3X5+1/5X7+…+1/(2n-1)(2n+1)的值为17/35,求n的值.

因式分解：x5+x3+1 找规律：1乘1,1乘2,2乘3,3乘5,接下去1x1 ,1x2 ,2x3 ,3x5 ,( ),( ).找规律 找规律题 若1/1X3+1/3X5+1/5X7+…+1/(2n-1)(2n+1)的值为17/35,求n的值. 1x1 2x2 3x3 4x4 5x5```````nxn有什么规律 解一道方程组x1+x2+x3=5,x2+x3+x4=1,x3+x4+x5=-5,x4+x5+x1=-3,x5+x1+x2=2 x5-x4+x3-x2+x-1因式分解 X5-X4+X3+X2+X+1因式分解 1/1x3+1/2x4+1/3x5+ 1/1x3+1/3x5+.+1/2005x2008 x1-x2+x3=1x2-x3+x4=21若x1,x2,x3,x4,x5满足方程组 x3-x4+x5=3x4-x5+x1=4x5-x1+x2=5求x2 x3 x4的值2已知 x1+x4+x6+x7=39 x2+x4+x5+x7=49 x3+x5+x6+x7=41 x4+x7=13 x5+x7=14 x6+x7=9 x1+x2+x3+x4+x5+x6+x7=9求x7的值若x1,x2,x3,x4,x5满足方程组 x1-x 3x5/3-5/3x3/1 怎么简算 若x1,x2,x3,x4,x5满足方程组：x1-x2+x3=1 x2-x3+x4=2 x3-x4+x5=3 x4-x5+x1=4 x5-x1+x2=5 求x2,x3,x4的少打了个字，是求x2，x3，x4的值 1x2+2x3+3x4+4x5+.+15x16 计算1x3+3x5+5x7+…+97x99 x1-x2+x3=1 x2-x3+x4=2 x3-x4+x5=3 x4-x5+x1=4 x5-x1+x2=5 求x1,x2,x3,x4,x5 数学智力乐园规律 1/1x2+1/2x3= 1/1x2+1/2x3+1/3x4= 1/1x2+1/2x3+1/3x4+1/4x5= 要规律 求解线性方程组 x1-2x2+3x3-x4-x5=2 x1+x2-x3+x4-2x5=1 2x1-求解线性方程组x1-2x2+3x3-x4-x5=2x1+x2-x3+x4-2x5=12x1-x2+x3-2x5=22x1+2x2-5x3+2x4-x5=5 一道简便计算数学题1X2+2X3+3X4+4X5...+n(n+1)一1X2+2X3+3X4+4X5...+2013X2014二写出规律三当n=4026为多少